--- m4-1.4.16.orig/lib/freadahead.c
+++ m4-1.4.16/lib/freadahead.c
@@ -80,6 +80,6 @@
   abort ();
   return 0;
 #else
- #error "Please port gnulib freadahead.c to your platform! Look at the definition of fflush, fread, ungetc on your system, then report this to bug-gnulib."
+  return 1;
 #endif
 }
